Why does the check engine light in my STS turn on when I start my car?

Generally, your check engine light turning on upon ignition is not a bad thing. This is just your STS testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.

Are Cadillac STS engine noises bad?

Strange engine sounds can be a sign something’s off in your Cadillac STS. Knocking or tapping could be a symptom of low oil. Whistling could mean a belt is misaligned or there's an intake leak. Squealing may be caused by a loose fan belt, and grinding might be coming from the brakes, not the engine.

What could damage a Cadillac engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your Cadillac STS engine?

Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' flooring the gas pedal while the car is in Park, or pushing 'the pedal to the metal' before the engine has warmed up. Protect your engine’s performance and efficiency by distancing yourself from these habits.

Is it okay to put water in my Cadillac STS radiator?

An emergency is the only time you should consider putting water in your radiator. Outside of that, it’s recommended you use a pre-mixed coolant or a 50/50 blend of water and coolant. However, if you need to continue driving your STS when you’re out of coolant, having water in the coolant reservoir is better than nothing.

What can cause a STS engine to suddenly stop?

There are different reasons your STS vehicle engine could suddenly stop. You may be looking at a lack of fuel, faulty sensors, issues with the ignition system, engine overheating, electrical problems, or mechanical troubles.

Who fixes Cadillac STS engines?

Your local Firestone Complete Auto Care fixes Cadillac STS engines. Book an appointment today! We have thousands of locations across the country.

2009 Cadillac STS Engine Repair

Learn about

2009 Cadillac STS Trim Options

Select your Cadillac STS trim level to learn more about Cadillac-recommended engine repair. Use the following chart to find information.

V6/3.6L

V8/4.4L

V8/4.6L

Repairs for Your 2009 Cadillac STS

Nothing lasts forever. Even your Cadillac STS’s engine parts and components will change. When something breaks, we're ready. Select a service or repair below to learn more about what we can do for your 2009 Cadillac STS.

We Care for Cadillac STS Engines

Cadillac STS drivers trust that their STS will take them near and far. You may have even been thinking about that when you bought it. Even so, pieces and parts can break down over time. Things can go wrong on the road. When they do, you might find yourself searching for 2009 Cadillac STS engine repair or replacement parts. That's when it's time to head to Firestone Complete Auto Care. We've serviced more than 500 million vehicles since 1926, and our technicians know Cadillac STS engines. Schedule a courtesy inspection at the first sign of engine trouble. Firestone Complete Auto Care offers both trustworthy and affordable engine repairs.

My 2009 Cadillac STS Check Engine Light Is On

If your STS check engine light is on, it’s time to get it looked at. A check engine light that’s on or flashing could be a symptom of a serious problem in your or emission system, and it won’t go away by ignoring it. Possible causes can include a failing oxygen sensor, damaged spark plug, a clogged catalytic converter, or an engine vacuum leak, to name a few possible causes. Stop by your local Firestone Complete Auto Care to get your STS issues diagnosed and we’ll figure out why that check engine light is giving you grief. engine rattling, oil leaks, or misfiring.

2009 STS Engine Services

When your Cadillac STS engine needs repairs, our technicians will make sure you understand what’s going on before they start working on your engine. We don't start working until we have your approval. If a service can wait, we’ll make sure you know. But if immediate repairs are necessary for your safety, we’ll make sure that's clear, too. We seek to give you all the info you need to make a smart decision about our services. Turn to Firestone Complete Auto Care for your 2009 STS engine repairs and you can feel good knowing that we only use Cadillac-compliant replacement parts such as the cambelt, motor oil seal, ignition coil, or another part.

2009 Cadillac STS Engine Q&A

Why does the check engine light in my STS turn on when I start my car? Generally, your check engine light turning on upon ignition is not a bad thing. This is just your STS testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.
Are Cadillac STS engine noises bad? Strange engine sounds can be a sign something’s off in your Cadillac STS. Knocking or tapping could be a symptom of low oil. Whistling could mean a belt is misaligned or there's an intake leak. Squealing may be caused by a loose fan belt, and grinding might be coming from the brakes, not the engine.
What could damage a Cadillac engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your Cadillac STS engine? Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' flooring the gas pedal while the car is in Park, or pushing 'the pedal to the metal' before the engine has warmed up. Protect your engine’s performance and efficiency by distancing yourself from these habits.
Is it okay to put water in my Cadillac STS radiator? An emergency is the only time you should consider putting water in your radiator. Outside of that, it’s recommended you use a pre-mixed coolant or a 50/50 blend of water and coolant. However, if you need to continue driving your STS when you’re out of coolant, having water in the coolant reservoir is better than nothing.
What can cause a STS engine to suddenly stop? There are different reasons your STS vehicle engine could suddenly stop. You may be looking at a lack of fuel, faulty sensors, issues with the ignition system, engine overheating, electrical problems, or mechanical troubles.
Who fixes Cadillac STS engines? Your local Firestone Complete Auto Care fixes Cadillac STS engines. Book an appointment today! We have thousands of locations across the country.